Add a Parallel Search MCP user-plugin example

docs/features/user-plugins/authoring.md

@@ -17,6 +17,11 @@ password field for a user-supplied Bearer key and includes ZIP packaging instruc
 rotation and removal guidance. The hosted service requires a separate account and may charge for
 usage; the example is optional and is not bundled or auto-enabled.
 
+For anonymous web search and page fetching, see
+[Parallel Search](../../../examples/user-plugins/parallel-search/README.md). This MCP-only example
+uses Streamable HTTP with no account or API key required. Package it as a small ZIP and explicitly
+enable it after installation; anonymous service rate limits apply.
+
 ## A complete skills-and-hooks package
 
 ```text

examples/user-plugins/parallel-search/.codex-plugin/plugin.json

@@ -0,0 +1,10 @@
+{
+  "name": "parallel-search",
+  "version": "0.1.0",
+  "description": "Free web search and page fetching through Parallel Search MCP. No account or API key required.",
+  "author": {
+    "name": "Parallel"
+  },
+  "license": "Apache-2.0",
+  "mcpServers": "./.mcp.json"
+}

examples/user-plugins/parallel-search/.mcp.json

@@ -0,0 +1,9 @@
+{
+  "parallel-search": {
+    "type": "http",
+    "url": "https://search.parallel.ai/mcp",
+    "headers": {
+      "User-Agent": "DeepChat-Parallel-Search/0.1.0 (https://github.com/ThinkInAIXYZ/deepchat)"
+    }
+  }
+}

examples/user-plugins/parallel-search/LICENSE

@@ -0,0 +1,202 @@
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examples/user-plugins/parallel-search/README.md

@@ -0,0 +1,73 @@
+# Parallel Search for DeepChat
+
+An optional MCP-only user plugin for free web search and page fetching with
+[Parallel Search MCP](https://docs.parallel.ai/integrations/mcp/search-mcp).
+No account or API key is required. Anonymous searches use Fast mode; the free endpoint has
+rate limits and is intended for exploration and light use.
+
+The package contains a manifest and remote MCP configuration, with no local commands, hooks,
+Skills or dependencies to install. Installation leaves the plugin disabled and preserves your
+existing model and MCP settings. It connects directly to `https://search.parallel.ai/mcp` using
+Streamable HTTP. Search queries and requested URLs are sent to Parallel when tools are called.
+
+## Install
+
+Use a DeepChat version with **Plugins → Install from ZIP**. The user-plugin installation flow
+is available in `v1.1.2-beta.5` and later; `v1.1.1` does not include it.
+
+1. Obtain a source checkout containing this example. For a pending PR, use its exact commit;
+   the example will only be available in upstream `dev` after merge.
+2. Package only this directory, including its hidden files. With Python 3, run from the
+   repository root:
+
+   ```sh
+   cd examples/user-plugins/parallel-search
+   python3 -m zipfile -c /tmp/parallel-search.zip .codex-plugin .mcp.json README.md LICENSE
+   ```
+
+   Choose another output path on Windows. Do not include the entire repository, `.git`,
+   credentials or `node_modules`. **Install from Git** on the whole DeepChat repository exceeds
+   the current plugin file-count limit; use the small ZIP instead.
+3. Open **Plugins → Install from ZIP**, select the archive and review the package. It should
+   contain only the `parallel-search` HTTP MCP server at the endpoint above, with no credential
+   variables, Skills or hooks. Select **MCP** and confirm installation.
+4. Explicitly enable the installed **parallel-search** plugin. No password or OAuth sign-in is
+   needed. Check its MCP status card for a running connection and discovered tools. Plugin-owned
+   servers do not appear in the ordinary MCP settings list.
+
+## Tools and controls
+
+The endpoint exposes `web_search` for finding pages and `web_fetch` for reading URLs. Under the
+discovered tool schemas, `web_search` accepts arguments such as:
+
+```json
+{
+  "objective": "Find the Python documentation for virtual environments",
+  "search_queries": ["Python virtual environment documentation"]
+}
+```
+
+Then call `web_fetch` with a URL from the result:
+
+```json
+{
+  "urls": ["https://docs.python.org/3/library/venv.html"],
+  "objective": "Explain how to create a virtual environment"
+}
+```
+
+Inspect the returned content. Discovery alone does not prove a tool call succeeded. This package
+uses DeepChat's existing tool and permission controls and does not configure external ACP agents.
+
+Disable the plugin to stop its integration, or uninstall it to remove its local configuration.
+Use **Review update** to import changes; editing your source checkout does not update an installed
+snapshot. Uninstalling does not remove previous conversation records.
+
+If a call is rate limited, wait for the service's retry time before trying again. For connection
+errors, check access to the endpoint and the plugin's diagnostic. Do not add an Authorization
+header to this anonymous example. For service limits and support, see the
+[Parallel Search MCP guide](https://docs.parallel.ai/integrations/mcp/search-mcp); for installation
+behavior, see DeepChat's [user-plugin guide](../../../docs/features/user-plugins/authoring.md).
+
+These example files use DeepChat's [Apache-2.0 license](./LICENSE). Parallel operates the hosted
+service separately. I work at Parallel.

test/main/plugin/userPluginLifecycle.test.ts

@@ -506,3 +506,67 @@ it('clears interrupted-update state even when restoring MCP settings fails', asy
   await new UserPlugins(f.deps).initialize()
   expect(f.store.pending()).toBeNull()
 })
+
+it('installs the anonymous Parallel ZIP without changing existing MCP settings', async () => {
+  const f = fixture()
+  const source = path.resolve('examples/user-plugins/parallel-search')
+  const archive = path.join(f.root, 'parallel-search.zip')
+  fs.writeFileSync(
+    archive,
+    zipSync(
+      Object.fromEntries(
+        fs
+          .readdirSync(source, { recursive: true, encoding: 'utf8' })
+          .filter((relative) => fs.statSync(path.join(source, relative)).isFile())
+          .map((relative) => [
+            relative.split(path.sep).join('/'),
+            fs.readFileSync(path.join(source, relative))
+          ])
+      )
+    )
+  )
+  const existing = await f.mcpSettings.getMcpServers()
+  const inspected = await f.service.inspect({ kind: 'zip', path: archive }, randomUUID())
+  expect(inspected.package).toMatchObject({
+    name: 'parallel-search',
+    skills: [],
+    hooks: [],
+    findings: [],
+    mcpServers: [
+      {
+        name: 'parallel-search',
+        type: 'http',
+        url: 'https://search.parallel.ai/mcp',
+        headers: {
+          'User-Agent': 'DeepChat-Parallel-Search/0.1.0 (https://github.com/ThinkInAIXYZ/deepchat)'
+        },
+        requiredVariables: []
+      }
+    ]
+  })
+  const installed = await f.service.install({
+    operationId: inspected.operationId,
+    selection: { skills: false, hooks: false, mcp: true }
+  })
+  expect(installed.ok).toBe(true)
+  expect(installed.status).toMatchObject({ enabled: false })
+  expect(await f.mcpSettings.getMcpServers()).toEqual(existing)
+  const id = installed.status!.id
+  expect((await f.service.enable(id)).ok).toBe(true)
+  const key = `${id}.parallel-search`
+  const enabled = await f.mcpSettings.getMcpServers()
+  expect(enabled[key]).toMatchObject({
+    type: 'http',
+    baseUrl: 'https://search.parallel.ai/mcp',
+    customHeaders: {
+      'User-Agent': 'DeepChat-Parallel-Search/0.1.0 (https://github.com/ThinkInAIXYZ/deepchat)'
+    },
+    environmentVariables: []
+  })
+  expect(f.mcpSettings.getMcpVariableBindings(enabled[key])).toEqual({})
+  for (const [name, config] of Object.entries(existing)) expect(enabled[name]).toEqual(config)
+  expect((await f.service.disable(id)).ok).toBe(true)
+  expect((await f.mcpSettings.getMcpServers())[key].enabled).toBe(false)
+  expect((await f.service.uninstall(id)).ok).toBe(true)
+  expect(await f.mcpSettings.getMcpServers()).toEqual(existing)
+})